FreeCalypso > hg > themwi-system-sw
annotate utils/tcpserv-dump.c @ 249:e980fe9c186c
sip-in: convert to libnumdb2
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 14 Aug 2023 23:38:24 -0800 |
parents | 9f6a148ceb25 |
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rev | line source |
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1 /* |
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2 * This debug utility binds to a TCP port specified on the command line, |
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3 * accepts incoming TCP connections and reads any bytes sent by a client |
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4 * on an opened connection - but never sends anything back. A log file |
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5 * is written, recording all received connections and bytes. |
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6 */ |
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7 |
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8 #include <sys/types.h> |
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9 #include <sys/socket.h> |
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10 #include <sys/time.h> |
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11 #include <sys/errno.h> |
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12 #include <netinet/in.h> |
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13 #include <arpa/inet.h> |
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14 #include <stdio.h> |
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15 #include <stdlib.h> |
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16 #include <string.h> |
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17 #include <strings.h> |
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18 #include <time.h> |
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19 #include <unistd.h> |
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20 |
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21 #define MAXCONN 10 |
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22 |
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23 static struct in_addr bind_ip; |
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24 static int tcp_port; |
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25 static int listener, nconn, conns[MAXCONN], max_fd; |
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26 static FILE *logf; |
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27 static struct timeval curtime; |
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28 static char fmt_time[32]; |
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29 |
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30 static void |
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31 format_time() |
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32 { |
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33 struct tm *tm; |
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34 |
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35 tm = gmtime(&curtime.tv_sec); |
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36 sprintf(fmt_time, "%d-%02d-%02dT%02d:%02d:%02dZ", |
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37 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, |
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38 tm->tm_hour, tm->tm_min, tm->tm_sec); |
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39 } |
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40 |
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41 static void |
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42 handle_accept(newfd, sin) |
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43 struct sockaddr_in *sin; |
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44 { |
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45 fprintf(logf, "\n%s Accept conn from %s:%u fd %d\n", fmt_time, |
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46 inet_ntoa(sin->sin_addr), ntohs(sin->sin_port), newfd); |
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47 if (nconn < MAXCONN) { |
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48 conns[nconn] = newfd; |
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49 nconn++; |
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50 if (newfd > max_fd) |
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51 max_fd = newfd; |
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52 } else { |
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53 fprintf(logf, "MAXCONN exceeded, closing new fd\n"); |
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54 close(newfd); |
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55 } |
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56 } |
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57 |
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58 static int |
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59 handle_conn_fd(fd) |
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60 { |
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61 u_char buf[512]; |
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62 int cc, off, chunk, i, c; |
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63 |
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64 cc = read(fd, buf, sizeof buf); |
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65 fprintf(logf, "\n%s fd %d read %d\n", fmt_time, fd, cc); |
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66 if (cc <= 0) { |
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67 fprintf(logf, "closing fd\n"); |
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68 return(1); |
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69 } |
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70 for (off = 0; off < cc; off += chunk) { |
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71 fprintf(logf, "%04X: ", off); |
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72 chunk = cc - off; |
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73 if (chunk > 16) |
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74 chunk = 16; |
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75 for (i = 0; i < 16; i++) { |
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76 if (i < chunk) |
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77 fprintf(logf, "%02X ", buf[off + i]); |
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78 else |
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79 fputs(" ", logf); |
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80 if (i == 7 || i == 15) |
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81 putc(' ', logf); |
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82 } |
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83 for (i = 0; i < chunk; i++) { |
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84 c = buf[off + i]; |
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85 if (c < ' ' || c > '~') |
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86 c = '.'; |
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87 putc(c, logf); |
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88 } |
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89 putc('\n', logf); |
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90 } |
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91 return(0); |
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92 } |
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93 |
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94 main(argc, argv) |
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95 char **argv; |
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96 { |
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97 int rc, i; |
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98 struct sockaddr_in sin; |
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99 socklen_t addrlen; |
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100 fd_set fds; |
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101 |
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102 if (argc != 4) { |
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103 fprintf(stderr, "usage: %s bind-ip port logfile\n", argv[0]); |
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104 exit(1); |
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105 } |
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106 bind_ip.s_addr = inet_addr(argv[1]); |
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107 if (bind_ip.s_addr == INADDR_NONE) { |
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108 fprintf(stderr, "error: invalid IP address argument \"%s\"\n", |
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109 argv[1]); |
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110 exit(1); |
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111 } |
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112 tcp_port = atoi(argv[2]); |
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113 listener = socket(AF_INET, SOCK_STREAM, 0); |
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114 if (listener < 0) { |
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115 perror("socket"); |
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116 exit(1); |
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117 } |
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118 sin.sin_family = AF_INET; |
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119 sin.sin_addr = bind_ip; |
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120 sin.sin_port = htons(tcp_port); |
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121 rc = bind(listener, (struct sockaddr *) &sin, sizeof sin); |
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122 if (rc < 0) { |
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123 perror("bind"); |
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124 exit(1); |
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125 } |
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126 logf = fopen(argv[3], "a"); |
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127 if (!logf) { |
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128 perror(argv[3]); |
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129 exit(1); |
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130 } |
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131 rc = listen(listener, 5); |
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132 if (rc < 0) { |
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133 perror("listen"); |
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134 exit(1); |
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135 } |
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136 gettimeofday(&curtime, 0); |
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137 format_time(); |
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138 fprintf(logf, "\n%s Test server started\n", fmt_time); |
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139 fflush(logf); |
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140 nconn = 0; |
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141 max_fd = listener; |
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142 for (;;) { |
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143 FD_ZERO(&fds); |
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144 FD_SET(listener, &fds); |
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145 for (i = 0; i < nconn; i++) |
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146 FD_SET(conns[i], &fds); |
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147 rc = select(max_fd+1, &fds, 0, 0, 0); |
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148 if (rc < 0) { |
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149 if (errno == EINTR) |
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150 continue; |
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151 perror("select"); |
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152 exit(1); |
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153 } |
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154 gettimeofday(&curtime, 0); |
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155 format_time(); |
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156 for (i = 0; i < nconn; ) { |
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157 if (!FD_ISSET(conns[i], &fds)) { |
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158 i++; |
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159 continue; |
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160 } |
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161 if (handle_conn_fd(conns[i])) { |
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162 close(conns[i]); |
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163 nconn--; |
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164 conns[i] = conns[nconn]; |
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165 } else |
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166 i++; |
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167 } |
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168 if (FD_ISSET(listener, &fds)) { |
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169 addrlen = sizeof(struct sockaddr_in); |
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170 rc = accept(listener, (struct sockaddr *) &sin, |
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171 &addrlen); |
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172 if (rc >= 0) |
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173 handle_accept(rc, &sin); |
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174 else |
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175 fprintf(logf, "\n%s accept syscall error!\n", |
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176 fmt_time); |
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177 } |
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178 fflush(logf); |
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179 } |
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180 } |